You're doing a whole series on the designs of Pokemon/Pokemon characters, and I had the idle thought: do you have thoughts on characters' partner Pokemon as an extension of their character design?
It's not clear to me how often that ever actually happens holistically, but it's certainly a tool the series uses constructively.
What I mean by that is, it doesn't seem to me like characters are designed specifically in conjunction with a specific Pokémon, where the mon and character act as extensions of one another's character designs. Giovanni has his famous Persian (in the anime anyway), and that Pokémon suits him well, but Persian wasn't designed to complement Giovanni. Ghetsis has his Hydreigon that uses Frustration at max power, which certainly tells us something about what he's like as a character, but Hydreigon was not initially designed for Ghetsis.
And I'm sure someone who's more into the weeds of trivia than me would know if I'm wrong here, but to my knowledge, while there are plenty of human characters who are designed to reflect Pokémon, there are barely any Pokémon that were designed specifically to reflect a human character. The one example I can think of off the top of my head is Nihilego and Lusamine, where Nihilego's shape design matches Lusamine's, and they seem designed specifically to fit together.
Nihilego acts as both an isolating bubble, shutting Lusamine further away from reality and her children, as well as a "crown" or royal mantle, and acts as an extension of Lusamine's devouring mother archetype with the many staring eyes and enveloping tentacles. Surveillance and constriction.
And of course, Llilie's initial design at the start of the game has more than a passing resemblance to Nihilego's shape language, which again raises this idea of Lusamine trying to figuratively climb inside of her daughter, to make her child an extension of herself, which is familiar to certain kinds of narcissistic parental abuse narratives.
and I am once again reminded how much Lillie is just the actual main character of Pokémon Sun and Moon and how much better the game would have been if we'd gotten to play as her, instead of a useless blank slate permasmiling player avatar doofus whose only function and capacity in the world is to win pokémon battles.
